Place the following organisms in order of appearance in the fossil record, beginning with the earliest
A. ferns, algae, flowering plants, gymnosperms
B. amphibians, reptiles, fish, mammals What will be an ideal response?
A) algae,ferns,gymnosperms
B) fish, amphibians,reptiles, mammals
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If two solutions have unequal concentrations of a solute, the solution with the lower concentration is called
A. isotonic. B. hypertonic. C. hypotonic. D. osmosis.
The organ that performs filtration of blood, reabsorption, and secretion in vertebrates is the _______.
A. small intestine B. pancreas C. liver D. kidney E. large intestine
The signal from the environment that triggers a stereotyped behavior is a
A. reinforcing stimulus. B. key stimulus (sign stimulus). C. releasing mechanism. D. fixed action pattern. E. conditioned reflex.
As a rule of thumb, how much of the food energy taken in by an herbivore is passed on to a carnivore (primary consumer)?
A. 10% B. 1% C. 5% D. 90% E. 50%